Which aggregate passes through sieve #4?

• A. Coarse aggregate
• B. Waste
• C. All of the above
• D. Fine aggregate

Answer: (D)

Sieve analysis distinguishes aggregates by size using openings like the No. 4 sieve, which has a 4.75 mm opening. Any particle smaller than that will pass through the sieve, while larger particles are retained. Fine aggregate consists of the smaller particles that pass through No. 4 (and is typically defined as material that passes No. 4 and is retained on a finer sieve, such as No. 200). Coarse aggregate, on the other hand, is made up of particles large enough to be retained on No. 4. Therefore, the material that passes through sieve No. 4 is fine aggregate.